<template>
  <div class="body">
    <a href="javascript:;">
      <span>Button</span>
      <div class="liquid"></div>
    </a>
  </div>
</template>

<style lang="scss" scoped>
.body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #0c0c0c;
  font-family: consolas;
}
a {
  position: relative;
  padding: 20px 50px;
  display: block;
  text-decoration: none;
  text-transform: uppercase;
  width: 200px;
  overflow: hidden;
}
a span {
  position: relative;
  z-index: 1;
  color: #ffffff;
  font-size: 20px;
  letter-spacing: 8px;
}
a .liquid {
  position: absolute;
  left: 0;
  top: -80px;
  width: 200px;
  height: 200px;
  background-color: #4973ff;
  box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.5);
  transition: 0.5s;
}
a:hover .liquid{
    top: -120px;
}
a .liquid::before,
a .liquid::after {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  top: 0;
  left: 50%;
  transform: translate(-50%, -75%);
  background: #000;
}
a .liquid::before {
  border-radius: 45%;
  background: rgba(20, 20, 20, 1);
  animation: animate 5s linear infinite;
}
a .liquid::after {
  border-radius: 40%;
  background: rgba(20, 20, 20, 0.5);
  animation: animate 10s linear infinite;
}

@keyframes animate {
  0% {
    transform: translate(-50%, -75%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -75%) rotate(360deg);
  }
}
</style>